1 // The template and inlines for the -*- C++ -*- slice_array class.
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
32 /** @file slice_array.h
33 * This is an internal header file, included by other library headers.
34 * You should not attempt to use it directly.
37 #ifndef _SLICE_ARRAY_H
38 #define _SLICE_ARRAY_H 1
40 #pragma GCC system_header
48 slice(size_t, size_t, size_t);
52 size_t stride() const;
55 size_t _M_off; // offset
57 size_t _M_st; // stride unit
60 // The default constructor constructor is not required to initialize
61 // data members with any meaningful values, so we choose to do nothing.
66 slice::slice(size_t __o, size_t __d, size_t __s)
67 : _M_off(__o), _M_sz(__d), _M_st(__s) {}
81 template<typename _Tp>
85 typedef _Tp value_type;
87 // This constructor is implemented since we need to return a value.
88 slice_array(const slice_array&);
90 // This operator must be public. See DR-253.
91 slice_array& operator=(const slice_array&);
93 void operator=(const valarray<_Tp>&) const;
94 void operator*=(const valarray<_Tp>&) const;
95 void operator/=(const valarray<_Tp>&) const;
96 void operator%=(const valarray<_Tp>&) const;
97 void operator+=(const valarray<_Tp>&) const;
98 void operator-=(const valarray<_Tp>&) const;
99 void operator^=(const valarray<_Tp>&) const;
100 void operator&=(const valarray<_Tp>&) const;
101 void operator|=(const valarray<_Tp>&) const;
102 void operator<<=(const valarray<_Tp>&) const;
103 void operator>>=(const valarray<_Tp>&) const;
104 void operator=(const _Tp &) const;
108 void operator=(const _Expr<_Dom,_Tp>&) const;
110 void operator*=(const _Expr<_Dom,_Tp>&) const;
112 void operator/=(const _Expr<_Dom,_Tp>&) const;
114 void operator%=(const _Expr<_Dom,_Tp>&) const;
116 void operator+=(const _Expr<_Dom,_Tp>&) const;
118 void operator-=(const _Expr<_Dom,_Tp>&) const;
120 void operator^=(const _Expr<_Dom,_Tp>&) const;
122 void operator&=(const _Expr<_Dom,_Tp>&) const;
124 void operator|=(const _Expr<_Dom,_Tp>&) const;
126 void operator<<=(const _Expr<_Dom,_Tp>&) const;
128 void operator>>=(const _Expr<_Dom,_Tp>&) const;
131 friend class valarray<_Tp>;
132 slice_array(_Array<_Tp>, const slice&);
135 const size_t _M_stride;
136 const _Array<_Tp> _M_array;
142 template<typename _Tp>
144 slice_array<_Tp>::slice_array(_Array<_Tp> __a, const slice& __s)
145 : _M_sz(__s.size()), _M_stride(__s.stride()),
146 _M_array(__a.begin() + __s.start()) {}
148 template<typename _Tp>
150 slice_array<_Tp>::slice_array(const slice_array<_Tp>& a)
151 : _M_sz(a._M_sz), _M_stride(a._M_stride), _M_array(a._M_array) {}
153 // template<typename _Tp>
154 // inline slice_array<_Tp>::~slice_array () {}
156 template<typename _Tp>
157 inline slice_array<_Tp>&
158 slice_array<_Tp>::operator=(const slice_array<_Tp>& __a)
160 std::__valarray_copy(__a._M_array, __a._M_sz, __a._M_stride,
161 _M_array, _M_stride);
165 template<typename _Tp>
167 slice_array<_Tp>::operator=(const _Tp& __t) const
168 { std::__valarray_fill(_M_array, _M_sz, _M_stride, __t); }
170 template<typename _Tp>
172 slice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
173 { std::__valarray_copy(_Array<_Tp>(__v), _M_array, _M_sz, _M_stride); }
175 template<typename _Tp>
178 slice_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
179 { std::__valarray_copy(__e, _M_sz, _M_array, _M_stride); }
181 #undef _DEFINE_VALARRAY_OPERATOR
182 #define _DEFINE_VALARRAY_OPERATOR(_Op,_Name) \
183 template<typename _Tp> \
185 slice_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const \
187 _Array_augmented_##_Name(_M_array, _M_sz, _M_stride, _Array<_Tp>(__v));\
190 template<typename _Tp> \
191 template<class _Dom> \
193 slice_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\
195 _Array_augmented_##_Name(_M_array, _M_stride, __e, _M_sz); \
199 _DEFINE_VALARRAY_OPERATOR(*, __multiplies)
200 _DEFINE_VALARRAY_OPERATOR(/, __divides)
201 _DEFINE_VALARRAY_OPERATOR(%, __modulus)
202 _DEFINE_VALARRAY_OPERATOR(+, __plus)
203 _DEFINE_VALARRAY_OPERATOR(-, __minus)
204 _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
205 _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
206 _DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
207 _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
208 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
210 #undef _DEFINE_VALARRAY_OPERATOR
214 #endif /* _SLICE_ARRAY_H */